EP1244676B1 - Schwefel enthaltende silane als kupplungsmittel - Google Patents

Schwefel enthaltende silane als kupplungsmittel Download PDF

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EP1244676B1
EP1244676B1 EP01939982A EP01939982A EP1244676B1 EP 1244676 B1 EP1244676 B1 EP 1244676B1 EP 01939982 A EP01939982 A EP 01939982A EP 01939982 A EP01939982 A EP 01939982A EP 1244676 B1 EP1244676 B1 EP 1244676B1
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group
meo
ome
sulfur
silane
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EP1244676A1 (de
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James D. Reedy
Kenneth M. Hartman
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General Electric Co
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General Electric Co
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages
    • C07F7/1872—Preparation; Treatments not provided for in C07F7/20
    • C07F7/1892—Preparation; Treatments not provided for in C07F7/20 by reactions not provided for in C07F7/1876 - C07F7/1888
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages

Definitions

  • Sulfur-containing silane coupling agents are useful in providing rubber, including automotive tires, with improved properties, generally by coupling inorganic fillers or fibers with the rubber matrix in a fashion which leads to the improved properties.
  • the sulfur-containing silane coupling agents which have achieved commercial success to date have been produced by disadvantageous processes which involve the handling of large quantities of chlorine-containing by-products. Thus, there is an ongoing need in the art to prepare sulfur-containing silane coupling agents safely in high yields and efficiencies by processes which do not involve chlorine-containing intermediates or by-products.
  • Trichlorosilane is reacted with either allyl chloride or vinyltoluene to provide the respective intermediates, 3-chloropropyltrichlorosilane or (trichlorosilylethyl)-toluene.
  • the former is reacted with alcohol to produce a 3-chloropropyl-trialkoxysilane, which is reacted with sodium hydrosulfide or sodium tetrasulfide to produce the desired products, plus four equivalents of chlorine.
  • the latter is reacted with sulfur monochloride, and the sulfurated trichlorosilane intermediate is reacted with alcohol to produce the desired product, plus five equivalents of chlorine.
  • Both of the above embodiments suffer from additional disadvantages in that yields from the reaction of trichlorosilane with allyl chloride are well below quantitative, based on the limiting reactant, with concurrent generation of undesired by-products.
  • the reaction of trichlorosilane with vinyltoluene is susceptible to polymerization of the vinyltoluene, with subsequent reduced efficiency to (trichlorosilylethyl)toluene and formation of a polymeric by-product.
  • EP 507 727 discloses glass coating with improved adhesion and weather resistance wherein the coating comprises a silicon containing compound of the formula [(EO) 3 Si-R-X] k -T wherein E is methyl or ethyl, R is ethylene or trimethylene, X is, among other possibilities, S and T is an alkyl group.
  • EP 963 995 describes a method for preparing a short-chain polysulfide silane mixture wherein - in the average range - between 2.1 and 2.9 sulphur atoms constitute a polysulfide chain in the molecule and wherein the polysulfide chain shows connectivity to two different carbon atoms.
  • US 5,286,815 is directed to a release coating composition comprising up to 100 percent by weight of a polysiloxane polymer wherein the end groups of the polymer consist of sulphur containing silanes.
  • EP 1 035 162 discloses RTV organopolysiloxane compositions comprising an organopolysiloxane and a sulphur containing silane compound.
  • US 5,916,973 relates to sodium, potassium or lithium salts of siloxy compounds useful in rubber compositions.
  • the present invention provides a process for preparing sulfur-containing silane coupling agents, some of which are novel compositions, by the reactions of alkoxysilane acetals with nonionic, chlorine-free sulfurating agents including, but not limited to, thiols, di-and higher thiols, hydrogen sulfide, and sulfur, in the presence of an acid catalyst, and optionally in the presence of hydrogen and an reduction catalyst.
  • the process is depicted by the general reaction:
  • the process of the invention is based on the following reaction: where R is a saturated or unsaturated linear, branched, or cyclic divalent hydrocarbon group of 2 to 12 carbon atoms optionally containing divalent -O- or -S- linkages; R 1 is an alkyl group of 1 to 4 carbon atoms, an aryl group of 6 to 12 carbon atoms, or an aralkyl or alkaryl group of 7 to 13 carbon atoms; each R 2 can be R 1 or the 2 R 2 groups taken together form an R group so as to form a ring; R 3 is a hydrogen atom or R 1 ; R 4 is R 3 , -RSH, or -RSiR 1 x (OR 2 ) 3-x ; x is an integer having a value of 0, 1.
  • the sulfur-containing silane coupling agents provided by the process of the present invention may thus be monomers or oligomers and may contain more than one molecular species. Where more than one group of R, R 1 , R 2 , R 3 , or R 4 is present in a molecule, said groups R, R 1 , R 2 , R 3 , and R 4 may be the same or different.
  • the alkoxysilane acetal raw materials are well-known in the art.
  • the unsaturated acetals are articles of commerce, as are the hydroalkoxysilanes, and the catalysts used for hydrosilation.
  • a particularly preferred hydroalkoxysilane is trimethoxysilane, as prepared by the direct reaction between silicon metal and methanol.
  • Preferred alkoxysilane acetal raw materials include compounds wherein R is a linear or branched divalent hydrocarbon group of 2 to 4 carbon atoms, R 1 is an alkyl group of 1 to 2 carbon atoms, R 2 is an alkyl group of 1 to 2 carbon atoms or 2 R 2 groups taken together form an R group, and R 3 is a hydrogen atom or an alkyl group of 1 to 2 carbon atoms.
  • alkoxysilane acetal include compounds wherein R is a linear divalent hydrocarbon group of 2 carbon atoms or a branched divalent hydrocarbon group of 3 carbon atoms, R 1 is a methyl group, R 2 is a methyl group or an ethyl group, and R 3 is a hydrogen or a methyl group.
  • compounds in the most preferred group include the following: (MeO) 3 SiCH 2 CH 2 CH(OMe) 2 Me(MeO) 2 SiCH 2 CH 2 CH(OMe) 2 (MeO) 3 SiCH 2 CHMeCH(OMe) 2 Me(MeO) 2 SiCH 2 CHMeCH(OMe) 2 (EtO) 3 SiCH 2 CH 2 CH(OMe) 2 Me(EtO) 2 SiCH 2 CH 2 CH(OMe) 2 (EtO) 3 SiCH 2 CH 2 CH(OEt) 2 Me(EtO) 2 SiCH 2 CH 2 CH(OEt) 2 Me 2 (MeO)SiCH 2 CHMeCH(OMe) 2 Me 2 (EtO)SiCH 2 CH 2 CH(OEt) 2 (MeO) 3 SiCH 2 CH 2 CH(O-Me) 2
  • Preferred sulfurating agents will depend on the product desired and may be selected singly or in combination from the group of thiols, di- and higher thiols, hydrogen sulfide, and sulfur, optionally in the presence of hydrogen and an effective reduction catalyst.
  • Sulfur serves as a source of hydrogen sulfide in the presence of hydrogen and an effective reduction catalyst.
  • Dithiols including 1,2-dimercaptoethane, 1,2-dimercaptopropane, and 1,3-dimercaptopropane are particularly preferred for preparing certain sulfur-containing silane coupling agents which are novel compositions.
  • the ratio between silane and sulfurating agent is not narrowly critical, but preferably is between a slight excess of sulfurating agent to near stoichiometric equivalent.
  • a suitable reduction catalyst is selected from the group of metal-containing catalysts which are effective for reduction in the presence of sulfur and its compounds.
  • Cobalt polysulfide is a preferred reduction catalyst for the process of the present invention, with a use level of 0.5 to 5 wt-% being preferred, and 1 to 3 wt-% being most preferred.
  • the process of the invention is preferably conducted in the presence of an acid catalyst, selected from the classes of protic (Bronsted) acids or nonprotic (Lewis) acids.
  • the former is exemplified by para -toluenesulfonic acid and a wide variety of carboxylic and inorganic acids.
  • the latter is exemplified by boron trifluoride, zinc salts, e.g., zinc chloride, and a number of other covalent metallic halides, including lanthanum chloride.
  • Acids in solid or supported forms may also be used, including acid forms of zeolites, acid clays, sulfonated derivatives of fluoropolymers, and acids of either of the above classes deposited on inorganic supports.
  • Acid catalyst is not a narrowly critical feature of the present invention, nor is its concentration. Any catalyst effective for the reaction can be used at an effective concentration. Acid concentrations in the range of 0.05 to 5 wt-% of the combined reactants are effective, with a concentration of 0.1 to 1 wt-% being preferred, and 0.1 to 0.5 wt-% being most preferred.
  • the process of the invention is performed at a temperature and pressure effective for the reaction, generally at an elevated temperature to assist in the removal of the alcohol by-product at ambient pressure.
  • Preferred reaction temperatures are in the range of 40° to 200°C and are not narrowly critical.
  • the process may be run at atmospheric pressure for convenience, but may also be run at subatmospheric or superatmospheric pressures. Running at superatmospheric pressure will normally be necessary if a hydrogen atmosphere is maintained during the process in the presence of a reduction catalyst.
  • equipment normally used for laboratory, pilot scale, or commercial scale synthetic chemistry, ranging form glassware to steel may be used for the process of the present invention.
  • solvents of various kinds may be used, for example, to assist in the introduction of raw materials and in the removal of the alcohol by-products.
  • solvents include aromatic and aliphatic hydrocarbons, alcohols, ketones and ethers.
  • aromatic hydrocarbons include xylene, toluene, and benzene.
  • aliphatic hydrocarbons include pentane, hexane, heptane, octane, isooctane, decane, cyclohexane and methylcyclohexane.
  • the alcohols are methanol, ethanol, isopropanol, propanol, butanol, hexanol, octanol and t-butanol.
  • the ketones are represented by methyl ethyl ketone, methyl isopropyl ketone and cyclohexanone.
  • the ethers are represented by tetrahydrofuran, dioxane, dioxolane and glyme. Certain of the solvents with low boiling points might require performing the reaction under elevated pressure.
  • the reaction mixtures produced by the process of this invention will typically comprise a mixture of subject silanes and alcohol. Depending on the particular alcohol, transesterification with the alkoxy silane may occur.
  • the alcohol may be removed by distillation or vacuum stripping. It is preferred to separate the alcohol to reduce its concentration to less than about 0.5%. There is typically no need to separate the individual silanes; however, where desired, this can be accomplished by chromatography or high or ultra-high-vacuum distillation.
  • the products prepared according to the invention are employed in natural and synthetic rubber compositions and blends of known and novel formulation, in amounts consistent with those previously employed for other silane coupling agents for the use in sulfur-vulcanizable, silica-reinforced tire rubber compositions.
  • exemplary of suitable amounts will be at least 2 parts per hundred parts rubber (PHR) and, preferably from about 4 to about 20 PHR, e.g., 6 to 12 PHR.
  • PHR parts per hundred parts rubber
  • the amount will also be related to the amount of silica employed, preferably the ratio by weight of silica to silane being in the range of from 4:1 to about 40:1, more narrowly from about 6:1 to about 10:1.
  • Molar ratios of added sulfur for vulcanization to sulfur in the silane can be varied within the range of from above 0 to about 100:1 or more, preferably from 2:1 to 20:1, more narrowly from 5:1 to 10:1.
  • the required amount of silane will decrease as its relative sulfur content increases.
  • suitable rubber compositions are sulfur-vulcanizable synthetic rubber compositions.
  • suitable rubber polymers include solution styrene-butadiene rubber (SSBR), styrene-butadiene rubber (SBR), natural rubber (NR), polybutadiene (BR), ethylene-propylene co- and ter- polymers (EP, EPDM), and acrylonitrile-butadiene rubber (NBR).
  • the rubber composition preferably is comprised of at least one diene-based elastomer, or rubber. Suitable conjugated dienes are isoprene and 1,3-butadiene and suitable vinyl aromatic compounds are styrene and alpha methyl styrene.
  • the rubber is a sulfur curable rubber.
  • Such diene based elastomer, or rubber may be selected, for example, from at least one of cis-1,4-polyisoprene rubber (natural and/or synthetic), and preferably natural rubber), emulsion polymerization prepared styrene/butadiene copolymer rubber, organic solution polymerization prepared styrene/butadiene rubber, 3,4-polyisoprene rubber, isoprene/butadiene rubber, styrene/isoprene/butadiene terpolymer rubber, cis-1,4-polybutadiene, medium vinyl polybutadiene rubber (35-50 percent vinyl), high vinyl polybutadiene rubber (50-75 percent vinyl), styrene/isoprene copolymers, emulsion polymerization prepared styrene/butadiene/acrylonitrile terpolymer rubber and butadiene/acrylonitrile copolymer rubber.
  • E-SBR emulsion polymerization derived styrene/butadiene
  • An E-SBR emulsion polymerization derived styrene/butadiene
  • E-SBR emulsion polymerization derived styrene/butadiene
  • Emulsion polymerization prepared styrene/butadiene/acrylonitrile terpolymer rubbers containing 2 to 40 weight percent bound acrylonitrile in the terpolymer are also contemplated as diene based rubbers for use in this invention.
  • the rubber compositions in addition to at least one elastomer of synthetic or natural origin, will contain a mineral filler, particularly silica, in amounts effective for reinforcing the rubber in its vulcanized state.
  • a mineral filler particularly silica
  • the silica can be of the types known, for example described in U.S. Patent Nos. 4,704,414, 5,227,425 and 5,753,732, and will be employed in amounts suitable for reinforcing tires, especially those having low rolling resistance.
  • the silica will be employed at a level of from about 5 to about 100 parts per hundred parts of rubber, preferably at least 30 parts silica. Higher or lesser amounts can be employed where appropriate.
  • Precipitated silicas are preferred fillers.
  • the silica may be characterized by having a BET surface area, as measured using nitrogen gas, preferably in the range of 40 to 600, and more usually in a range of 50 to 300 m 2 /g.
  • the silica typically may also be characterized by having a dibutylphthalate (DBP) absorption value in a range of 100 to 350, and more usually 150 to 300.
  • DBP dibutylphthalate
  • the silica, as well as the aforesaid alumina and aluminosilicate may be expected to have a CTAB surface area in a range of 100 to 220.
  • the average mercury porosity specific surface area for the silica should be in a range of 100 to 300 m 2 /g.
  • the rubber composition may be compounded by methods known in the rubber compounding art, such as mixing the various sulfur-vulcanizable constituent rubbers with various commonly used additive materials such as, for example, curing aids, such as sulfur, activators, retarders and accelerators, processing additives, such as oils, resins including tackifying resins, silicas, plasticizers, fillers, pigments, fatty acid, zinc oxide, waxes, antioxidants and antiozonants, peptizing agents, and reinforcing materials such as, for example, carbon black.
  • curing aids such as sulfur, activators, retarders and accelerators
  • processing additives such as oils, resins including tackifying resins, silicas, plasticizers, fillers, pigments, fatty acid, zinc oxide, waxes, antioxidants and antiozonants, peptizing agents, and reinforcing materials such as, for example, carbon black.
  • processing additives such as oils, resins including tackifying resins, silicas, plasticizers, fillers
  • a rubber composition may prepared by a process such as by:
  • the rubber compositions of the invention are employed to form various rubber articles, including shoe soles and tire parts, such as treads and sidewalls in the normal fashion as conventional silica-reinforced, sulfur vulcanizable rubber compositions.
  • Alkoxysilane acetals were prepared by the platinum-catalyzed hydrosilations of acrolein dimethyl acetal, acrolein 1,2-propylene acetal, and methacrolein dimethyl acetal with trimethoxysilane or methyldimethoxysilane.
  • Example 1 The procedure and apparatus of Example 1 were used with 77.2 g (0.345 m) of (3,3-dimethoxypropyl)trimethoxysilane, 37.5 g (0.371 m) of ethane-1,2-dithiol and 0.23 g of lanthanum chloride as catalyst.
  • the crude product (89.6 g) contained 20% of methanol and raw materials, plus 14.5% of 2-(2-trimethoxysilylethyl)-1,3-dithiolane, 37.3% of the monosubstitution product, (MeO) 3 Si(CH 2 ) 2 CH(OMe)S(CH 2 ) 2 SH, and 19.6% of a dimeric product, [(MeO) 3 Si(CH 2 ) 2 CH(OMe)SCH 2 ] 2 , as determined by GC/MS.
  • Example 1 The procedure and apparatus of Example 1 were used with 36.2 g (0.177 m) of (3,3-dimethoxypropyl)methyldimethoxysilane, 18.31 g (0.195 m) of ethane-1,2-dithiol, and 0.13 g of zinc chloride catalyst. Reaction and work-up as in Example 1 provided crude product containing lesser amounts of raw materials and 69.4% of the title compound, as determined by GC/MS.
  • Example 1 The procedure and apparatus of Example 1 were used with 22.4 g (0.207 m) of propane-1,3-dithiol, 46.4 g (0.207 m) of (3,3-dimethoxypropyl)trimethoxysilane, 0.14 g of p -toluene-sulfonic acid, and 100 ml of xylenes solvent. Methanol was removed by distillation as the contents of the flask were heated at reflux (143°) for 2 hours. The crude product, excluding solvent, contained 75% of the title product and 7.4% of the monosubstituted product, (MeO) 3 Si(CH 2 ) 2 CH(OMe)S(CH 2 ) 3 SH, as determined by GC/MS.
  • Example 1 The procedure and apparatus of Example 1 were used with 25.0 g (0.102 m) of (3,3-dimethoxy-2-methylpropyl)trimethoxysilane (boiling point, 125°/25 mm, prepared by the hydrosilation of methacrolein dimethyl acetal with trimethoxysilane, as characterized by GC/MS and NMR), 9.6 g (0.102 m) of ethane-1,2-dithiol, and 0.07 g of anhydrous zinc chloride catalyst.
  • An apparatus was assembled consisting of a 500 ml three-necked flask fitted with a mechanical stirrer, distillation head and receiver, sparge tube to introduce hydrogen sulfide, and a sodium methylate scrubber to remove hydrogen sulfide from the exiting gases.
  • To the flask were charged 108.3 g (0.426 m) of (3,3-dimethoxypropyl)-trimethoxysilane, 0.3 g of p -toluenesulfonic acid, and 200 g of toluene solvent.
  • the flask and contents were heated at 100-120° for 9 hours while hydrogen sulfide was introduced at 0.04 liters/minute.
  • the flask contents were heated to 140° and volatiles (including 3-mercaptopropyltrimethoxysilane) removed at 1 mm vacuum.
  • Example 2 The procedure and apparatus of Example 1 were used with 98.1 g (0.50 m) of 3-.mercaptopropyltrimethoxysilane, 52.5 g (0.227 m) of (3,3-dimethoxypropyl)-trimethoxysilane, and 0.75 g of zinc chloride catalyst. The reactants were heated at 135°C for 2.75 hours and 11.8 g (93.3% methanol) of volatiles were removed.
  • the crude product, 129 g, was analyzed by GC/MS and contained 27.3% 3-mercaptopropyl-trimethoxysilane, 35% cis/trans-(MeO) 3 Si(CH 2 ) 3 S-CH CHCH 2 Si(OMe) 3 , and 12% of the dithioacetal [(MeO) 3 Si(CH 2 ) 3 S] 2 CH(CH 2 ) 2 Si(OMe) 3 , as determined by GC/MS.
  • Example 9 Certain of the experiments of Example 9 were repeated using hydrogen sulfide rather than sulfur as the source of sulfur. Good results were obtained when run with 121.5 g of the alkoxysilane acetal, 0.5 wt-% of acetic acid, 2.5 wt-% of cobalt polysulfide catalyst, 34g (1.85 m) of hydrogen sulfide, and hydrogen at 1600 psi as charged at room temperature. Heating up to 200° and holding for 2.25 hours provided 158.3 g of crude product from which a 61 % yield of 3-mercaptopropyltrimethoxysilane (based on acetal) was recovered by distillation. Nondistilled product was largely the same trithiane as observed in Example 9.

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Claims (14)

  1. Verfahren zur Herstellung eines Schwefelsilans, umfassend das Umsetzen eines Alkoxysilanacetals mit einem Sulfurierungsmittel in Anwesenheit eines Katalysators, wobei das Schwefel-haltige Silan die Formel [R1 x(R2O)3-xSiRCR3(Y)jS]n(X)j aufweist, worin
    R eine gesättigte oder ungesättigte lineare, verzweigte oder cyclische zweiwertige Kohlenwasserstoffgruppe mit 2 bis 12 Kohlenstoffatomen ist, die gegebenenfalls zweiwertige -O- oder -S-Verknüpfungen enthält;
    R1 eine Alkylgruppe mit 1 bis 4 Kohlenstoffatomen, eine Arylgruppe mit 6 bis 12 Kohlenstoffatomen oder eine Aralkyl- oder Alkarylgruppe mit 7 bis 13 Kohlenstoffatomen ist;
    jedes R2 für R1 stehen kann oder die 2 Gruppen R2 zusammengenommen eine Gruppe R unter Bildung eines Rings bilden;
    R3 ein Wasserstoffatom oder R1 ist;
    R4 für R3, -RSH oder -RSiR1 x(OR2)3-x steht;
    x eine ganze Zahl mit einem Wert von 0, 1 oder 2 ist;
    n eine ganze Zahl mit einem Wert von 1 bis 4 ist;
    j = 0 oder 1; wenn n = 1, j = 1, wenn n > 1, j = 0; X für R4 steht und Y für -SR4 oder -OR2 steht oder alternativ X und Y zusammengenommen -SR- sind, welches einen 1,3-Dithiacycloalkan-Ring mit dem Kohlenstoff bildet, der R3 trägt, wenn n = 1, oder X und Y beide Wasserstoffatome sind, wenn n = 1 und R3 ein Wasserstoffatom ist.
  2. Verfahren nach Anspruch 1, in dem R eine gesättigte lineare oder verzweigte zweiwertige Kohlenwasserstoffgruppe mit 2 oder 3 Kohlenstoffatomen ist; R2 eine Methylgruppe ist, R2 für R1, eine Ethylgruppe steht oder 2 Gruppen R2 zusammengenommen eine Gruppe R bilden; R3 ein Wasserstoffatom oder eine Methylgruppe ist; R4 ein Wasserstoffatom, die Gruppe -RSH oder die Gruppe -RSiR1 x(OR2)3-x ist; und x eine ganze Zahl mit einem Wert von 0 oder 1 ist; n eine ganze Zahl mit einem Wert von 1 oder 3 ist.
  3. Verfahren nach Anspruch 1, in dem das Alkoxysilanacetal aus der Gruppe ausgewählt ist, die aus (MeO)3SiCH2CH2CH(OMe)2, Me(MeO)2SiCH2CH2CH(OMe)2, (MeO)3SiCH2CHMeCH(OMe)2, Me(MeO)2SiCH2CHMeCH(OMe)2, (EtO)3SiCH2CH2CH(OMe)2, Me(EtO)2SiCH2CH2CH(OMe)2, (EtO)3SiCH2CH2CH(OEt)2 und Me(EtO)2SiCH2CH2CH(OEt)2 besteht und das Sulfurierungsmittel aus der Gruppe ausgewählt ist, die aus Schwefelwasserstoff, HSRSH und HSRSiR1 x(OR2)3-x und Schwefel besteht.
  4. Verfahren nach Anspruch 1, in dem der Katalysator aus der Gruppe der Brönsted-Säuren und Lewis-Säuren in flüssiger oder fester Form ausgewählt ist und in einer Konzentration von 0,05 bis 5 Gewichtsprozent der vereinigten Reaktanten vorliegt.
  5. Verfahren nach Anspruch 1, in dem das Sulfurierungsmittel Schwefelwasserstoff oder Schwefel in Anwesenheit von Wasserstoffgas und eines Reduktionskatalysators ist und das Hauptprodukt HSRSiR1 x(OR2)3-x ist, worin R eine gesättigte lineare oder verzweigte zweiwertige Kohlenwasserstoffgruppe ist, R1 eine Methylgruppe ist, R2 eine Methylgruppe oder eine Ethylgruppe ist und x eine ganze Zahl mit einem Wert von 0 oder 1 ist.
  6. Verfahren nach Anspruch 5, in dem der Reduktionskatalysator Cobaltpolysulfid ist und das Hauptprodukt HS(CH2)3Si(OMe)3 ist.
  7. Verfahren nach Anspruch 6, zusätzlich umfassend den Schritt der Entfernung von Alkohol aus dem Schwefelsilan nach der Umsetzung.
  8. Silan, das ein Mitglied ist, das aus der Gruppe ausgewählt ist, die besteht aus (die Definitionen von R, R1, R2, R3, x sind in Anspruch 1 angegeben): [R1 x(R2O)3-xSiRC(R3)2S]cR'Si(OR2)3-xR1x, worin R' ein (c+1)-wertiger Kohlenwasserstoff ist und c = 2 bis 3; [R1 x(R2O)3-xSiRC(R3)(OR2)S]2R; R1 x(R2O)3-xSiRC(R3)2SRSH; [R1 x(R2O)3-xSiRCR3(-)S(-)]q, worin q = > 2; und R1 x(R2O)3-xSiR-cyclo(C(R3)SRS-).
  9. Silan nach Anspruch 8 gemäß der Formel R1 x(R2O)3-xSiRC(R3)2SRSH.
  10. Silan nach Anspruch 8 gemäß der Formel R1 x(R2O)3-xSiR-cyclo(C(R3)SRS-).
  11. Silan, bestehend aus einer Formel, die aus der Gruppe ausgewählt ist, die besteht aus (MeO)3Si(CH2)2CH(SCH2)2; (EtO)3Si(CH2)2CHSCH2CHMeS; (MeO)3Si(CH2)2CH(SCH2)2CH2; Me(MeO)2Si(CH2)2CH(SCH2)2; (MeO)3SiCH2CHMeCH(SCH2)2; [(MeO)3Si(CH2)3S]2CH(CH2)2Si(OMe)3; (MeO)3Si(CH2)2CH(OMe)S(CH2)2SH; [(MeO)3Si(CH2)2CHS]3; [Me(MeO)2Si(CH2)2CHS]3; [(MeO)3Si(CH2)2CH(OMe)SCH2]2; [(EtO)3Si(CH2)2CHS]3; und (MeO)3Si(CH2)3S(CH2)2SH.
  12. Kautschuk-Zusammensetzung, umfassend Kautschuk, Siliciumdioxid und ein Silan nach Anspruch 9.
  13. Kautschuk-Zusammensetzung, umfassend Kautschuk, Siliciumdioxid und ein Silan nach Anspruch 10.
  14. Kautschuk-Zusammensetzung, umfassend Kautschuk, Siliciumdioxid und ein Silan nach Anspruch 11.
EP01939982A 2000-01-05 2001-01-03 Schwefel enthaltende silane als kupplungsmittel Expired - Lifetime EP1244676B1 (de)

Applications Claiming Priority (3)

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US478283 2000-01-05
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WO2001049695A1 (en) 2001-07-12
CN1184223C (zh) 2005-01-12
JP2003519237A (ja) 2003-06-17
EP1244676A1 (de) 2002-10-02
US20020002220A1 (en) 2002-01-03
ATE279420T1 (de) 2004-10-15
TW526203B (en) 2003-04-01
DE60106381T2 (de) 2005-02-24
CN1394208A (zh) 2003-01-29
DE60106381D1 (de) 2004-11-18
US6518335B2 (en) 2003-02-11

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